ext4_group_desc_csum_verify
if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
extern int ext4_group_desc_csum_verify(struct super_block *sb, __u32 group,
if (!ext4_group_desc_csum_verify(sb, i, gdp)) {
if (!ext4_group_desc_csum_verify(sb, g, gdp)) {